Universal joint for connecting-rods.



E. A. BEARUP. I UNIVERSAL JOINT FOR CONNECTING RODS.

APPLICATION FILED MAR 6, I916.

Patented Jan. 30, 1917.

JifHIlIM ELI A. BEARUP, 0F FLINT, MICHIGAN.

UNIVERSAL JOINT FOR CONNECTING-RODS.

raise-re.

Specification of Letters Fatent.

Patented Jan. 36*, 191W.

Application filed'March 6, 1916. Serial No. 82,312.

To all whom it may concern:

Be it known that I, Em A. BEARUP, a citizen of the United States,residing at Flint, county of Genesee, State of Michigan, have invented acertain new and useful Improvement in Universal Joints for Connecting-Rods, and declare the following to be a full, clear, and exactdescription of the same, such as will enable others skilled in the artto which it pertains to make and use the same, reference being had tothe accompanying drawings, which form a part of this specification.

My invention relates to improvements in a connecting-rod and mountingsin the cylinders of internal combustion engines or other engines of thesingle cylinder type more particularly applicable to engines employed indriving automobiles.

It has for its object so mounting the connecting rod on the piston thatit may have a slight longitudinal play on the crankshaft without bindingthe piston in the cylinder, and it consists in the arrangements andcombinations hereinafter described and claimed.

In the drawings,-Figure 1, is an elevation, partly in section, of theconnecting-rod embodying my improvement, the piston being shown inphantom. Fig. 2, is a similar view at right angles to Fig. 1. Fig. 8, isa top elevation of the connecting rod end and the wrist pin, ahorizontal section of the piston appearing in phantom lines.

In the drawings similar letters refer to similar parts.

Fig. 1, shows the mounting at right-angles to the crankshaft (not shown)and therefore the lower .end of the connectingrod of such figure woulddescribe the circle described by the crank.

In Fig. 2, the plane of the circle described by the crank would cut thefigure at rightangles to the plane of the figure shown and, therefore,it shows how the lower end of the connecting-rod may be allowed to swingfrom side to side without binding.

A, represents the piston sectioned.

B, is the wrist pin.

C, is a block upon the wrist pin and through which it is inserted.

D is the connecting-rod.

I accomplish the results by putting the pin B through the piston in theusual manner and also a block C in which it closely fits, al though notnecessarily so. The upper end d of the connecting rod D is provided witha transverse opening square in cross section to fairly closely fit theblock on the sides, but with sutlicient lost motion to permit themovement hereinafter described. The block C has a perforation upon eachside at 0, 0, and corresponding perforations cl, d are in the connectingrod, such perforations being preferably threaded, and set-screws E, Eare inserted from each side with terminations e, 6 adapted to enter theperforations 0, c in the block C. As these are at right angles to thewrist pin 13 and as the block C is not closely held within the squaredend of the connecting-rod, the connecting-rod is adapted to have arotational movement to a slight extent upon theends e, e of the setscrews E, E. This permits the lower end of the connecting-rod to have aslight oscillatory movement as the crankshaft rotates and this preventsany disarrangement or disalinement upon the pin 13 in the piston.

It is obvious that even a slight sidewise movement upon the crank pin orcrank shaft of the lower end of the connecting-rod would throw thebearings upon the pin 13 out of line unless a corresponding movement eX-isted at that point, and as there are always greater or lessimperfections in the line-up and fitting of parts, it is not unusualthat these parts bind unless more lost motion is given than is reallydesirable. My device obviates this entirely and reduces every movementto a rotating one upon bearings which are not thrown out of alinement bysuch movements.

What I claim is:

In motion converting means, the combination of a piston having alinedtransverse passage-ways through its walls, a block provided with apassage-way therethrough adapted to register with the passage-waysthrough the piston walls and provided with bearing apertures in itssides, a wrist pin adapted to be driven through the passageways in thepiston walls and through the passageway in the said block, a connectingrod provided with an inner end having a transverse opening somewhatlarger than the outside dimensions of the said block, the said aperturesin the sides of the inner end of the lnner end of the connecting rodwith the connecting rod and having bearil'ig portions said block beingadjusted in its proper posiengaging in the bearing apertures in the tionwith respect to the piston before the sides of the block, substantiallyas described. 5 Wrist pin is driven through the piston Walls Intestimony whereof, I sign this specifiand the passage-Way of the block,and cation.

threaded trunnions screwed into threaded ELI A. BEARUP.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents.

Washington, D C.

